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@@ -1,345 +0,0 @@
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-
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-
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- * ldso/ldso/sh64/elfinterp.c
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- *
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- * SuperH (sh64) ELF shared library loader suppport
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- *
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- * Copyright (C) 2003, 2004, 2005 Paul Mundt <lethal@linux-sh.org>
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- *
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- * All rights reserved.
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- *
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- * Redistribution and use in source and binary forms, with or without
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- * modification, are permitted provided that the following conditions
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- * are met:
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- * 1. Redistributions of source code must retain the above copyright
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- * notice, this list of conditions and the following disclaimer.
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- * 2. The name of the above contributors may not be
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- * used to endorse or promote products derived from this software
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- * without specific prior written permission.
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- *
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- * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
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- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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- * ARE DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE
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- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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- * SUCH DAMAGE.
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- */
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-
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-
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- References to symbols in sharable libraries can be resolved by either
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- an ELF sharable library or a linux style of shared library. */
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-
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-
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- I ever taken any courses on internals. This program was developed using
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- information available through the book "UNIX SYSTEM V RELEASE 4,
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- Programmers guide: Ansi C and Programming Support Tools", which did
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- a more than adequate job of explaining everything required to get this
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- working. */
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-
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-#include "ldso.h"
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-
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-extern int _dl_linux_resolve(void);
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-
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-unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry)
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-{
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- ELF_RELOC *this_reloc;
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- char *strtab;
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- ElfW(Sym) *symtab;
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- int symtab_index;
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- char *rel_addr;
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- char *new_addr;
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- char **got_addr;
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- unsigned long instr_addr;
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- char *symname;
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-
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- rel_addr = (char *)tpnt->dynamic_info[DT_JMPREL];
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-
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- this_reloc = (ELF_RELOC *)(intptr_t)(rel_addr + reloc_entry);
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- symtab_index = ELF_R_SYM(this_reloc->r_info);
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-
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- symtab = (ElfW(Sym) *)(intptr_t)tpnt->dynamic_info[DT_SYMTAB];
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- strtab = (char *)tpnt->dynamic_info[DT_STRTAB];
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- symname = strtab + symtab[symtab_index].st_name;
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-
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-
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- instr_addr = ((unsigned long)this_reloc->r_offset +
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- (unsigned long)tpnt->loadaddr);
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- got_addr = (char **)instr_addr;
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-
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-
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-
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- new_addr = _dl_find_hash(symname, &_dl_loaded_modules->symbol_scope, tpnt, ELF_RTYPE_CLASS_PLT, NULL);
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- if (unlikely(!new_addr)) {
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- _dl_dprintf(2, "%s: can't resolve symbol '%s'\n",
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- _dl_progname, symname);
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- _dl_exit(1);
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- }
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-
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-#ifdef __SUPPORT_LD_DEBUG__
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- if ((unsigned long)got_addr < 0x20000000) {
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- if (_dl_debug_bindings) {
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- _dl_dprintf(_dl_debug_file, "\nresolve function: %s",
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- symname);
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-
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- if (_dl_debug_detail)
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- _dl_dprintf(_dl_debug_file,
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- "\n\tpatched %x ==> %x @ %x\n",
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- *got_addr, new_addr, got_addr);
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- }
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- }
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-
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- if (!_dl_debug_nofixups)
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- *got_addr = new_addr;
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-#else
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- *got_addr = new_addr;
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-#endif
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-
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- return (unsigned long)new_addr;
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-}
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-
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-static int _dl_parse(struct elf_resolve *tpnt, struct r_scope_elem *scope,
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- unsigned long rel_addr, unsigned long rel_size,
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- int (*reloc_fnc)(struct elf_resolve *tpnt,
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- struct r_scope_elem *scope,
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- ELF_RELOC *rpnt, ElfW(Sym) *symtab,
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- char *strtab))
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-{
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- unsigned int i;
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- char *strtab;
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- ElfW(Sym) *symtab;
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- ELF_RELOC *rpnt;
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- int symtab_index;
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-
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-
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- rpnt = (ELF_RELOC *)(intptr_t)rel_addr;
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- rel_size = rel_size / sizeof(ELF_RELOC);
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-
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- symtab = (ElfW(Sym) *)(intptr_t)tpnt->dynamic_info[DT_SYMTAB];
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- strtab = (char *)tpnt->dynamic_info[DT_STRTAB];
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-
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- for (i = 0; i < rel_size; i++, rpnt++) {
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- int res;
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-
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- symtab_index = ELF_R_SYM(rpnt->r_info);
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- debug_sym(symtab,strtab,symtab_index);
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- debug_reloc(symtab,strtab,rpnt);
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-
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- res = reloc_fnc (tpnt, scope, rpnt, symtab, strtab);
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- if (res == 0)
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- continue;
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-
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- _dl_dprintf(2, "\n%s: ",_dl_progname);
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-
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- if (symtab_index)
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- _dl_dprintf(2, "symbol '%s': ",
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- strtab + symtab[symtab_index].st_name);
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-
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- if (unlikely(res < 0)) {
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- int reloc_type = ELF_R_TYPE(rpnt->r_info);
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-
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- _dl_dprintf(2, "can't handle reloc type "
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-#ifdef __SUPPORT_LD_DEBUG__
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- "%s\n", _dl_reltypes(reloc_type)
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-#else
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- "%x\n", reloc_type
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-#endif
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- );
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-
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- _dl_exit(-res);
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- }
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- if (unlikely(res > 0)) {
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- _dl_dprintf(2, "can't resolve symbol\n");
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-
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- return res;
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- }
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- }
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-
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- return 0;
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-}
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-
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-static int _dl_do_reloc(struct elf_resolve *tpnt,struct r_scope_elem *scope,
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- ELF_RELOC *rpnt, ElfW(Sym) *symtab, char *strtab)
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-{
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- int reloc_type;
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- int symtab_index, lsb;
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- char *symname;
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- unsigned long *reloc_addr;
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- unsigned long symbol_addr;
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-#ifdef __SUPPORT_LD_DEBUG__
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- unsigned long old_val;
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-#endif
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- struct symbol_ref sym_ref;
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-
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- reloc_type = ELF_R_TYPE(rpnt->r_info);
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- symtab_index = ELF_R_SYM(rpnt->r_info);
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- symbol_addr = 0;
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- lsb = !!(symtab[symtab_index].st_other & STO_SH5_ISA32);
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- sym_ref.sym = &symtab[symtab_index];
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- sym_ref.tpnt = NULL;
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- symname = strtab + symtab[symtab_index].st_name;
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- reloc_addr = (unsigned long *)(intptr_t)
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- (tpnt->loadaddr + (unsigned long)rpnt->r_offset);
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-
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- if (symtab_index) {
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- int stb;
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-
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- symbol_addr = (unsigned long)_dl_find_hash(symname, scope, tpnt,
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- elf_machine_type_class(reloc_type), &sym_ref);
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-
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-
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- * We want to allow undefined references to weak symbols - this
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- * might have been intentional. We should not be linking local
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- * symbols here, so all bases should be covered.
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- */
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- stb = ELF_ST_BIND(symtab[symtab_index].st_info);
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-
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- if (stb != STB_WEAK && !symbol_addr) {
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- _dl_dprintf (2, "%s: can't resolve symbol '%s'\n",
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- _dl_progname, symname);
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- _dl_exit (1);
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- }
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- if (_dl_trace_prelink) {
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- _dl_debug_lookup (symname, tpnt, &symtab[symtab_index],
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- &sym_ref, elf_machine_type_class(reloc_type));
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- }
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- }
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-
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-#ifdef __SUPPORT_LD_DEBUG__
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- old_val = *reloc_addr;
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-#endif
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-
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- switch (reloc_type) {
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- case R_SH_NONE:
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- break;
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- case R_SH_COPY:
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- _dl_memcpy((char *)reloc_addr,
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- (char *)symbol_addr, symtab[symtab_index].st_size);
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- break;
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- case R_SH_DIR32:
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- case R_SH_GLOB_DAT:
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- case R_SH_JMP_SLOT:
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- *reloc_addr = (symbol_addr + rpnt->r_addend) | lsb;
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- break;
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- case R_SH_REL32:
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- *reloc_addr = symbol_addr + rpnt->r_addend -
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- (unsigned long)reloc_addr;
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- break;
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- case R_SH_RELATIVE:
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- *reloc_addr = (unsigned long)tpnt->loadaddr + rpnt->r_addend;
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- break;
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- case R_SH_RELATIVE_LOW16:
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- case R_SH_RELATIVE_MEDLOW16:
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- {
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- unsigned long word, value;
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-
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- word = (unsigned long)reloc_addr & ~0x3fffc00;
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- value = (unsigned long)tpnt->loadaddr + rpnt->r_addend;
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-
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- if (reloc_type == R_SH_RELATIVE_MEDLOW16)
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- value >>= 16;
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-
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- word |= (value & 0xffff) << 10;
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- *reloc_addr = word;
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-
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- break;
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- }
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- case R_SH_IMM_LOW16:
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- case R_SH_IMM_MEDLOW16:
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- {
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- unsigned long word, value;
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-
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- word = (unsigned long)reloc_addr & ~0x3fffc00;
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- value = (symbol_addr + rpnt->r_addend) | lsb;
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-
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- if (reloc_type == R_SH_IMM_MEDLOW16)
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- value >>= 16;
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-
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- word |= (value & 0xffff) << 10;
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- *reloc_addr = word;
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-
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- break;
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- }
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- case R_SH_IMM_LOW16_PCREL:
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- case R_SH_IMM_MEDLOW16_PCREL:
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- {
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- unsigned long word, value;
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-
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- word = (unsigned long)reloc_addr & ~0x3fffc00;
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- value = symbol_addr + rpnt->r_addend -
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- (unsigned long)reloc_addr;
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-
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- if (reloc_type == R_SH_IMM_MEDLOW16_PCREL)
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- value >>= 16;
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-
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- word |= (value & 0xffff) << 10;
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- *reloc_addr = word;
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-
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- break;
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- }
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- default:
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- return -1;
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- }
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-
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-#ifdef __SUPPORT_LD_DEBUG__
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- if (_dl_debug_reloc && _dl_debug_detail)
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- _dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x @ %x\n",
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- old_val, *reloc_addr, reloc_addr);
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-#endif
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-
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- return 0;
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-}
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-
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-static int _dl_do_lazy_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope,
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- ELF_RELOC *rpnt, ElfW(Sym) *symtab, char *strtab)
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-{
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- int reloc_type, symtab_index, lsb;
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- unsigned long *reloc_addr;
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-#ifdef __SUPPORT_LD_DEBUG__
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- unsigned long old_val;
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-#endif
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-
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- reloc_type = ELF_R_TYPE(rpnt->r_info);
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- symtab_index = ELF_R_SYM(rpnt->r_info);
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- lsb = !!(symtab[symtab_index].st_other & STO_SH5_ISA32);
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- reloc_addr = (unsigned long *)(intptr_t)
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- (tpnt->loadaddr + (unsigned long)rpnt->r_offset);
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-
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-#ifdef __SUPPORT_LD_DEBUG__
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- old_val = *reloc_addr;
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-#endif
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-
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- switch (reloc_type) {
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- case R_SH_NONE:
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- break;
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- case R_SH_JMP_SLOT:
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- *reloc_addr += (unsigned long)tpnt->loadaddr | lsb;
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- break;
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- default:
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- return -1;
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- }
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-
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-#ifdef __SUPPORT_LD_DEBUG__
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- if (_dl_debug_reloc && _dl_debug_detail)
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- _dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x @ %x\n",
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- old_val, *reloc_addr, reloc_addr);
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-#endif
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-
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- return 0;
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-}
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-
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-void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt,
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- unsigned long rel_addr, unsigned long rel_size)
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-{
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- (void)_dl_parse(rpnt->dyn, NULL, rel_addr, rel_size, _dl_do_lazy_reloc);
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-}
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-
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-int _dl_parse_relocation_information(struct dyn_elf *rpnt,
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- struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size)
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-{
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- return _dl_parse(rpnt->dyn, scope, rel_addr, rel_size, _dl_do_reloc);
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-}
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